diff --git a/MVMCore/MVMCore/Categories/NSArray+MFConvenience.h b/MVMCore/MVMCore/Categories/NSArray+MFConvenience.h
index 481c332..8fb9036 100644
--- a/MVMCore/MVMCore/Categories/NSArray+MFConvenience.h
+++ b/MVMCore/MVMCore/Categories/NSArray+MFConvenience.h
@@ -38,9 +38,9 @@
 - (nonnull NSString *)stringAtIndex:(NSUInteger)index;
 
 // Maps this array to a new array of T objects given a conversion block. Objective-C implementation of Swift's map. https://developer.apple.com/documentation/swift/array/2908681-map
-- (nonnull NSArray *)map:(id _Nullable (^_Nonnull)(id _Nonnull obj))mapBlock;
-- (nonnull NSArray *)filter:(BOOL (^_Nullable)(id _Nonnull obj))block;
+- (nonnull NSArray *)map:(id _Nonnull (^_Nonnull)(id _Nonnull obj))mapBlock;
+- (nonnull NSArray *)filter:(BOOL (^_Nonnull)(id _Nonnull obj))block;
 - (nonnull id)reduce:(id _Nonnull)initial block:(id _Nonnull (^_Nonnull)(id _Nonnull obj1,id _Nonnull obj2))block;
-- (nullable NSArray *)flatMap:(id _Nullable (^_Nonnull)(id _Nullable obj))block;
+- (nonnull NSArray *)flatMap:(id _Nonnull (^_Nonnull)(id _Nonnull obj))block;
 
 @end